S-93279A140 12.7 mm ID x 21.1 mm OD DIN 127B Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications, ensuring long-term joint integrity
• DIN 127B compliance guarantees precise dimensional tolerances and reliable performance in metric fastener systems
• Rockwell C44 hardness provides exceptional durability and spring action for repeated use without deformation
• Blue-dyed steel construction offers quick visual identification while maintaining corrosion resistance
• Precision 12.7mm ID and 21.1mm OD dimensions ensure perfect fit for M12 fasteners and optimal locking force distribution
• RoHS 3 compliance meets environmental regulations for safe use across global industrial markets
• 2.3-2.7mm thickness range delivers consistent compression and reliable locking performance across varying assembly conditions

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these M12 split lock washers provide critical vibration damping in machinery, automotive assemblies, and heavy equipment where constant motion threatens fastener security. The blue-dyed steel material serves dual purposes: offering basic corrosion protection while enabling quick visual inspection in complex assemblies. Manufactured to DIN 127B standards, these washers deliver predictable spring force and consistent performance across production runs. The split lock design creates continuous upward pressure against fastener heads and bearing surfaces, effectively resisting rotational loosening from vibration and thermal cycling. This makes them ideal for industrial applications requiring reliable, maintenance-free locking solutions that withstand dynamic loads and temperature variations.

Specification Summary & Compliance

This split lock washer features precision dimensions with 12.7mm inner diameter and 21.1mm outer diameter, specifically designed for M12 fastener applications. Manufactured to DIN 127B specifications, it ensures consistent quality and dimensional accuracy. The washer meets Rockwell C44 hardness requirements for optimal spring performance and is fully RoHS 3 (2015/863/EU) compliant for environmental safety. The standard split lock design provides reliable locking action across various industrial and mechanical applications where vibration resistance is critical.